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Opis: This study analyses the many different parameters of the in-plane flexibility problem regarding the lateral behaviour of light timber-framed (LTF) wall elements with different types of sheathing material (FPB, OSB, or even reinforced concrete), as well as the thickness of the timber frame elements (internal or external wall elements). The analysis simultaneously considers bending, shear, and timber-to-framing connection flexibility, while assuming stiff-supported wall elements as prescribed by Eurocode 5. Particular emphasis is placed on the sliding deformation between sheathing boards and the timber frame, which can significantly reduce the overall stiffness of LTF wall elements. The influence of fastener spacing (s) on sliding deformation and overall stiffness is comprehensively analysed, as well as the different bending and shear behaviours of the various sheathing materials. The results show that reducing the fastener spacing can significantly improve the stiffness of OSB wall elements, while it is less critical for FPB elements used in mid-rise timber buildings. A comparison of external and internal wall elements revealed a minimal difference in racking stiffness (3.3%) for OSB and FPB specimens, highlighting their comparable performance. The inclusion of RC sheathing on one side of the LTF elements showed significant potential to improve torsional behaviour and in-plane racking stiffness, making it a viable solution for strengthening prefabricated multi-storey timber buildings. These findings provide valuable guidance for optimizing the design of LTF walls, ensuring improved structural performance and extended application possibilities in modern timber construction.
Ključne besede: timber, structures, light timber-framed element, modelling, numerical analysis
Objavljeno v DKUM: 17.03.2025; Ogledov: 0; Prenosov: 7
Celotno besedilo (3,47 MB)
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Opis: Magistrska naloga obravnava potresno odpornost in predlog sanacije Dijaškega doma v Celju. Objekt je bil sprojektiran leta 1977, ko so na slovenskem območju veljala pravila o dimenzioniranju in izvedbi gradbenih objektov v potresnih območjih, ki so bila objavljena v Uradnem listu Socialistične republike Slovenije leta 1963. S potresno analizo v programu Tower smo ugotovili, da objekt po trenutno veljavnem standardu Eurocode 8 ni potresno odporen. Zato smo v nalogi predlagali dve možnosti sanaciji. Prva vključuje spremembo konstrukcijskega sistema iz torzijsko podajnega v sistem nepovezanih (konzolnih) sten, s čimer smo povečali dejavnik obnašanja in zmanjšali potresno obtežbo na vpetju konstrukcije. V okviru predloga sanacije 2 smo upoštevali obstoječo arhitekturno zasnovo in dodali nove nosilne stene tako, da nismo vplivali na trenutno razporeditev dijaških sob in skupnih prostorov. Konstrukcijski sistem se v okviru predloga sanacije 2 ni spremenil od obstoječega. Potresna obtežba je bila večja kot v obstoječi konstrukciji, vendar so bile nove stene dovolj toge, da so prevzele več potresne obremenitve kot obstoječe.
Ključne besede: potres, modalna analiza, duktilne stene, potresna sanacija
Objavljeno v DKUM: 27.09.2024; Ogledov: 0; Prenosov: 64
Celotno besedilo (7,02 MB)

Opis: The paper presents an innovative approach in the modelling of multi-storey timber-framed buildings, where double-skin façade elements (DSF) are additionally considered as load-bearing wall elements against a horizontal load impact. The mathematical model with a fictive diagonal element developed for timber-framed wall elements with classical oriented strand boards (OSB) or fibre–plaster sheathing boards (FPB) is upgraded for DSF elements. The diameter of the fictive diagonal is determined with either experimental results or numerically obtained results using the time-consuming FEM model with elastic spring elements, which simulates the bonding line between the timber frame and both glazing panes. In the second part of the study, the numerical analysis of a specially selected three-storey timber-framed building was performed using the developed mathematical model with fictive diagonal elements. Two alternative calculations were performed with the DSF elements as non-resisting and racking-resisting wall elements. It was demonstrated on the selected case that the racking resistance (R) of a building can essentially increase up to 35% if DSF elements are considered as resisting wall elements. As a secondary goal of the study, it is also important to point out that by using DSF elements as racking-resisting elements, the distortion in the first floor essentially decreased. It is demonstrated on the selected numerical example that this torsional influence decreased notably (by almost 18%) when the load-bearing DSF elements were used for seismic excitation in the X direction. Therefore, such an approach can open new perspectives in designing multi-storey timber-framed buildings with a more attractive and dynamic floor plan and structure.
Ključne besede: sustainability, timber, structures, multi-storey, numerical analysis, DSF, racking resistance
Objavljeno v DKUM: 19.03.2024; Ogledov: 225; Prenosov: 39
Celotno besedilo (4,93 MB)
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Opis: Slovenija je dežela gozdov, ki pokrivajo skoraj 60 % njene površine, zato ni presenetljivo, da je lesena gradnja v Sloveniji v porastu. V diplomskem delu sem projektiral enodružinsko dvonadstropno leseno montažno hišo z dimenzijami 9,32 m x 12,95 m. Upošteval sem lastno težo, koristno obtežbo, sneg in veter. Prav tako sem izračunal togost sten in celotne konstrukcije. Ostrešje je narejeno iz špirovcev, kapnih leg, slemenskih leg, izolacije, parnih ovir in kritine. Stene so okvirnopanelne, sestavljene iz lesene nosilne konstrukcije, izolacije, mavčno-vlaknenih plošč in zaključnih slojev. Medetažne plošče so sestavljene iz nosilcev, izolacije iz mavčno-vlaknenih plošč in zaključnega sloja. Obtežbe v posameznih etažah se prenesejo na lesene nosilce, ki sestavljajo medetažne plošče. Sile medetažnih plošč se prenesejo najprej na okvirnopanelni sistem in nato na temelje. Izvedel sem kontrolo tlačnih napetosti pravokotno na vlakna in uklon pokončnikov. Na koncu sem izračunal še horizontalne pomike etaž.
Ključne besede: gradbeništvo, lesene hiše, okvirno-panelni sistem, montažna hiša
Objavljeno v DKUM: 01.06.2023; Ogledov: 540; Prenosov: 138
Celotno besedilo (2,92 MB)

Opis: Magistrsko delo v prvem delu opisuje razvoj lesene gradnje in razvoj stikov skeletne gradnje od samega začetka do danes. V drugem delu je opisana eksperimentalna analiza izbranih stikov v leseni skeletni gradnji, izvedenih s pomočjo tradicionalnih tesarskih zvez. Dobljene rezultate smo primerjali z rezultati numerične analize, ki smo jo izvedli s programsko opremo Solidworks. Z zadovoljivim ujemanjem obeh analiz in s pomočjo numerične analize smo nato pridobili tudi količine, ki jih je z eksperimentalno analizo težko ali nemogoče izmeriti. Z vsemi pridobljenimi podatki in vedenjem smo v zadnjem delu preverili še ustreznost stikov, izvedenih s pomočjo tesarskih zvez po standardu SIST EN 1995-1:2005 na prostorskem modelu realnega lesenega skeletnega objekta.
Ključne besede: lesena skeletna gradnja, nosilnost tesarskih zvez, analiza napetosti, eksperimentalna in numerična analiza
Objavljeno v DKUM: 12.06.2018; Ogledov: 1811; Prenosov: 236
Celotno besedilo (3,94 MB)